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bnxt: Enforce PTP software freq adjustments only when in non-RTC mode

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Currently driver performs software based frequency adjustments
when RTC capability is not discovered or when in shared PHC mode.
But there may be some old firmware versions that still support
hardware freq adjustments without RTC capability being exposed.
In this situation driver will use non-realtime mode even on single
host NICs.

Hence enforce software frequency adjustments only when running in
shared PHC mode. Make suitable changes for cyclecounter for the
same.

Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Pavan Chebbi
2023-03-21 07:44:49 -07:00
committed by Jakub Kicinski
parent edc5287315
commit a02c331307
1 changed files with 10 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+10 -4
View File
@@ -230,7 +230,7 @@ static int bnxt_ptp_adjfine(struct ptp_clock_info *ptp_info, long scaled_ppm)
ptp_info);
struct bnxt *bp = ptp->bp;
if (BNXT_PTP_USE_RTC(bp))
if (!BNXT_MH(bp))
return bnxt_ptp_adjfine_rtc(bp, scaled_ppm);
spin_lock_bh(&ptp->ptp_lock);
@@ -861,9 +861,15 @@ static void bnxt_ptp_timecounter_init(struct bnxt *bp, bool init_tc)
memset(&ptp->cc, 0, sizeof(ptp->cc));
ptp->cc.read = bnxt_cc_read;
ptp->cc.mask = CYCLECOUNTER_MASK(48);
ptp->cc.shift = BNXT_CYCLES_SHIFT;
ptp->cc.mult = clocksource_khz2mult(BNXT_DEVCLK_FREQ, ptp->cc.shift);
ptp->cmult = ptp->cc.mult;
if (BNXT_MH(bp)) {
/* Use timecounter based non-real time mode */
ptp->cc.shift = BNXT_CYCLES_SHIFT;
ptp->cc.mult = clocksource_khz2mult(BNXT_DEVCLK_FREQ, ptp->cc.shift);
ptp->cmult = ptp->cc.mult;
} else {
ptp->cc.shift = 0;
ptp->cc.mult = 1;
}
ptp->next_overflow_check = jiffies + BNXT_PHC_OVERFLOW_PERIOD;
}
if (init_tc)